Pump



J. L. JOHNSON.

PUMP.

APPLICATION FILED MAR. 22, I920.

Patented May 18, 1920.

WNHHIWI NV N TOR. 0M., ,of

IIJIIIIIII UNITED STATES PATENT OFFICE.

JOHN L. JOHNSON, or Ia'uivmrin5 TEXAS.

PUMP. t

Specification of Letters Patent.

Application filed March 22, 1920. Serial No. 367,814.

To allwlwm it may concern.' r

Be it known that I, JcrrN L. JOHNS-0N, a citizen of the United States,residing at Humble, inthe county of Harris and State of Texas, haveinvented certain new and useful Improvements in Pumps, of which the,following is a specification. Y

This invention relates to new and useful improvements in a pump.

One object of the invention is to provide a pump of the characterdescribed equipped with an attachment through which the pump may becleansed of sand or other foreign matter which may collect therein andinterfere with the operation of the pump valve.

With the above and other objects in view, the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example of which is given in thisspecification, and illustrated in the accompanying drawings wherein,

Figure 1 shows a vertical sectional view of a well screen showing thepump therein with the cleaning attachment applied thereto and shown insection- Fig. 2 is an enlarged fragmentary vertical sectional view of apump showing the cleaning device attached and,

Fig. 3 shows a transverse sectional view taken on the line 3, 3 of Fig.1.

Referring now more particularly to the drawings wherein like numerals ofreference designate similar parts in each of the figures the numeral 1refers to a well screen which is preferably formed of perforated pipeand4 which in use is let down into the oil bearing strata of an oilwell. The lower end of this screen is usually closed by means of a cap2. The numeral 3 designates the standing barrel of a pump through whichthe oil is pumped to the surface of the ground. Within the barrel 3there is a reciprocating valve (not shown) and secured in the lower endof said barrel is a standing valvel. This standing Vmaterial is disposedto settle around the valve, within the valve cage, and to become packedtherein so as to restrict, or entirely stop the operation of the pump.In order to kcleanse the pump of this sand, an attachment has beendesigned which will now be described.

A perforated pipe section 5 is attached to the lower end of the pump, bymeans of the usual coupling 6, and threaded on to the lower end of thispipe section is a hollow casting 7 formed with an internal chamber 8 andhaving the upstanding annular flange 9, within which the lower end ofthe perforated section 5 is screwed. Arranged concentric-ally withinsaid pipe section 5 there is an upstanding nozzle pipe 10, whose upperend is contracted forming the nozzle 11 and whose lower end is threadedthrough the upper wall 12 of the casting 7. Arranged on the outside ofthe pipe sec tion 5 there is an inlet water line 13 whose lower end isthreaded into the casting 7, and through which water may be forced fromthe surface of the ground, under pressure, into the chamber 8. Theunderside of the cast king 7 has an outlet opening as 14; which iscontrolled by the outlet valve 15.

Then the pump becomes sanded up it is lirst elevated some distance abovethe bottom cap 2 of the well screen, and water is then forced, underpressure, through the water line 13 into the chamber 8 and out throughthe outlet opening 14, thus carrying away all sand which may havecollected in said chamber 8 and in the nozzle pipe 10. The pump is thenlowered until it rests on the cap 2 at the bottom of the screen and thevalve 15 is thereby held tightly closed. Tater is then again forcedunder pressure down through the water line 13 and will pass into thechamber 8, and up through the nozzle pipe 10 and the nozzle 11 and willbe projected up through the seat of the standing valve at the bottom ofthe pump barrel 3, and will loosen up and wash away the sand which mayhave settled and become packed in said valve. he nozzle pipe 10 isprovided near its lower end with a port 16 through which part of thewater passes in order to loosen up and wash away the sand which may havesettled around said nozzle pipe. The sand thus loosened up by theagitation of the water forced in under pressure, as explained, may bepumped out in the usual way.

What I claim is:

1. An attachment for pumps including a perforated pipe attached to thelower end of the pump barrel, an upstanding nozzle pipe therein whoseupper end is formed into a nozzle, alined under the standing valve ofthe pump, and means through which water may be forced under pressurethrough said nozzle and projected againstV said pump valve.

2. An attachment for pumps including a Patented May 18, 1920.

perforated pipe section adapted to be attached to the lower end of apump barrel, a nozzle pipe arranged concentrically within and spacedfrom said pipe section, and means through which Huid may be forced underpressure through said nozzle pipe and projected against the standingvalve of the pump.

3. An attachment for pumps including a perforated pipe section adaptedto be secured to the lower end of the pump barrel, a casting formed withan internal chamber, carried by the lower end of said pipe section, anoutlet opening through which Huid may be discharged through saidchamber, a

Valve controlling said opening, a nozzle pipe arranged within said pipesection and spaced from the walls thereof and communicating with saidchamber, and a line entering said chamber through which fluid may beforced under pressure into said chamber and up through said nozzle pipe,whereby said fluid is projected against the standing Valve arranged inthe bottom of said pump barrel.

4. The combination with a pump having a standing valve in the lower endof the barrel thereof, of a perforated pipe section attached to thelower end of said pump barrel, a nozzle pipe arranged c onccntricallywithin said perforated section under said valve, said nozzle pipe beingprovided with a lateral port, and means through which fluid may beforced under pressure into the lower end of said nozzle pipe andprojected through the nozzle thereof against said Valve and through saidport into the spacek between said pipe section and nozzle pipe.

In testimony7 whereof, I have signed my name to this specification inthe presence of two subscribing witnesses.

JOHN L. JOHNSON. lVtnesses J. DIXIE SMITH,

S. V. Goss.

